<?php
    $province = $_POST['province'];

    switch($province){
        case "山东省" :
            $cities = '["1","2","3"]';
            break;
        case "辽宁省" :
            $cities = '["4","5","6"]';
            break;
        case "吉林省" :
            $cities = '["7","8","9"]';
            break;
        case "广东省" :
            $cities = '["0","0","8"]';
            break;
    }

    echo $cities;
?>
